watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.0.92:6252] Modules linked in: irq event stamp: 12672299 hardirqs last enabled at (12672298): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (12672299): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (12558968): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (12558968): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (12558968): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (12558971): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (12558971): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (12558971): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 1 UID: 0 PID: 6252 Comm: syz.0.92 Not tainted 6.15.0-rc3-syzkaller-g91dbac407653 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:migrate_disable+0xad/0x190 kernel/sched/core.c:2386 Code: f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 59 96 90 00 49 c7 c6 20 a9 76 92 4d 03 37 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 <84> c0 0f 85 96 00 00 00 41 ff 06 43 0f b6 44 25 00 84 c0 0f 85 a3 RSP: 0018:ffffc90000a07fb0 EFLAGS: 00000a06 RAX: 0000000000000000 RBX: ffff88802f5bde40 RCX: 85a07826c56cb200 RDX: 0000000000000100 RSI: ffffffff8bc1c780 RDI: ffffffff8bc1c740 RBP: ffffc90000a080d8 R08: ffffc90000a0806f R09: 0000000000000000 R10: ffffc90000a08060 R11: fffff5200014100e R12: dffffc0000000000 R13: 1ffff11005eb7bc8 R14: ffff8880b893a920 R15: ffffffff8d96bc18 FS: 00007ff48be8b6c0(0000) GS:ffff8881261d0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff48be6ad58 CR3: 000000002f9da000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_prog_run_array include/linux/bpf.h:2210 [inline] trace_call_bpf+0x229/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10788 do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] perf_trace_lock_acquire+0x335/0x410 include/trace/events/lock.h:24 __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5829 rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:841 [inline] class_rcu_constructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0xc2/0x2390 arch/x86/kernel/unwind_orc.c:479 __unwind_start+0x5b9/0x760 arch/x86/kernel/unwind_orc.c:758 unwind_start arch/x86/include/asm/unwind.h:64 [inline] arch_stack_walk+0xe4/0x150 arch/x86/kernel/stacktrace.c:24 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2398 [inline] slab_free mm/slub.c:4656 [inline] kmem_cache_free+0x192/0x3f0 mm/slub.c:4758 kfree_skb_reason include/linux/skbuff.h:1279 [inline] kfree_skb include/linux/skbuff.h:1288 [inline] ip6_mc_input+0x9c3/0xbe0 net/ipv6/ip6_input.c:591 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5887 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6000 process_backlog+0x60e/0x14f0 net/core/dev.c:6352 __napi_poll+0xc4/0x480 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:__schedule+0x16ec/0x4cd0 kernel/sched/core.c:6727 Code: c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 2c a4 cb f6 4d 89 27 4c 89 f7 4c 89 e6 e8 de 23 dd f5 48 89 c7 e8 56 c8 3b f6 31 ff <4d> 39 e6 40 0f 95 c7 48 8b b4 24 c0 00 00 00 e8 a0 d1 3b f6 48 c7 RSP: 0018:ffffc9001a9b74a0 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffff88801c6ed194 RCX: ffffffff8191d66b RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000000 RBP: ffffc9001a9b76b0 R08: ffff88802f833c03 R09: 1ffff11005f06780 R10: dffffc0000000000 R11: ffffed1005f06781 R12: ffff88801c6ebc00 R13: dffffc0000000000 R14: ffff88802f5bda00 R15: ffff8880b8939b50 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7090 irqentry_exit+0x6f/0x90 kernel/entry/common.c:354 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__srcu_check_read_flavor+0x0/0x150 kernel/rcu/srcutree.c:725 Code: 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 55 41 57 41 56 41 55 41 54 53 89 f3 49 89 ff 83 fe 02 RSP: 0018:ffffc9001a9b7830 EFLAGS: 00010202 RAX: 000000000cabb4b0 RBX: ffff88814d3abc60 RCX: 0000000000000001 RDX: 0000000000000dc0 RSI: 0000000000000001 RDI: ffffffff8e05a520 RBP: 0000000000000dc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff8214ac7d R12: ffff88814d3abc60 R13: ffff88801a041500 R14: ffff88801a041500 R15: 0000000000000001 srcu_check_read_flavor include/linux/srcutree.h:339 [inline] srcu_read_lock+0x12/0x60 include/linux/srcu.h:251 kasan_quarantine_reduce+0x4c/0x160 mm/kasan/quarantine.c:259 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4161 [inline] slab_alloc_node mm/slub.c:4210 [inline] __do_kmalloc_node mm/slub.c:4340 [inline] __kmalloc_node_noprof+0x21b/0x4e0 mm/slub.c:4347 kmalloc_node_noprof include/linux/slab.h:932 [inline] __vmalloc_area_node mm/vmalloc.c:3647 [inline] __vmalloc_node_range_noprof+0x51a/0x12c0 mm/vmalloc.c:3844 __vmalloc_node_noprof mm/vmalloc.c:3907 [inline] __vmalloc_noprof+0x7a/0x90 mm/vmalloc.c:3921 bpf_prog_alloc_no_stats+0x4a/0x4e0 kernel/bpf/core.c:104 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:146 bpf_prog_load+0x735/0x1930 kernel/bpf/syscall.c:2881 __sys_bpf+0x5f1/0x860 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff48af8e969 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff48be8b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007ff48b1b6080 RCX: 00007ff48af8e969 RDX: 0000000000000094 RSI: 0000200000002c80 RDI: 0000000000000005 RBP: 00007ff48b010ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff48b1b6080 R15: 00007ffe367afc28 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5842 Comm: kworker/u9:7 Not tainted 6.15.0-rc3-syzkaller-g91dbac407653 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 Workqueue: hci2 hci_cmd_timeout RIP: 0010:univ8250_console_write+0x0/0xa0 drivers/tty/serial/8250/8250_core.c:393 Code: ff 4c 89 f7 e8 41 ea e5 fc e9 ad fc ff ff 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 57 41 56 53 89 d3 49 89 f6 49 89 ff e8 da f9 83 fc RSP: 0018:ffffc9000437f598 EFLAGS: 00000046 RAX: 1ffffffff1cf3e3a RBX: ffffffff81a1027a RCX: ca6905c427badb00 RDX: 0000000000000023 RSI: ffffffff99842c40 RDI: ffffffff8e79f1c0 RBP: ffffc9000437f6f0 R08: 0000000000000000 R09: 0000000000080000 R10: 0000000000008000 R11: ffffffff853bc390 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000200 R15: ffffffff8e79f1c0 FS: 0000000000000000(0000) GS:ffff8881260d0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe7f590088 CR3: 0000000060652000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: console_emit_next_record kernel/printk/printk.c:3138 [inline] console_flush_all+0x725/0xc40 kernel/printk/printk.c:3226 __console_flush_and_unlock kernel/printk/printk.c:3285 [inline] console_unlock+0xc4/0x270 kernel/printk/printk.c:3325 vprintk_emit+0x5b7/0x7a0 kernel/printk/printk.c:2450 _printk+0xcf/0x120 kernel/printk/printk.c:2475 bt_err+0x10b/0x160 net/bluetooth/lib.c:296 hci_cmd_timeout+0xff/0x1e0 net/bluetooth/hci_core.c:1457 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245